Effect of waste mango silage on the in vitro gas production, in situ digestibility, intake, apparent digestibility, and ruminal characteristics in calf diets.

Background and Aim: Mexico is the fifth largest producer of mangoes in the world. For the conservation of agro-industrial waste and crop residues, the ensiling technique has shown good results. This study aimed to evaluate the effect of increasing the level of mango silage (86% waste mango and 14% pangola grass hay) in calf diets on in vitro gas production, in situ digestibility, intake, apparent digestibility, and ruminal characteristics. Materials and Methods: The diets contained 0 (T0), 30 (T1), 45 (T2), and 60% (T3) mango silage. The partial (24, 48, and 72 h) and cumulative (72 h) biogas, CH4 production, and degradation were determined in the in vitro evaluation. In situ digestibility and estimators of fermentation kinetics of dry matter (DM) and organic matter (OM) were determined. Intake, apparent nutrient digestibility, and rumen parameters of calves (200 kg) were evaluated in a 4 × 4 Latin square design. Response to increased mango silage was calculated by linear and quadratic orthogonal contrasts. Results: In vitro partial and cumulative biogas production decreased linearly (p < 0.05), and the partial and cumulative CH4 production did not show linear or quadratic contrast (p > 0.05); in vitro DM degradation, in vitro neutral detergent fiber degradation, and in vitro acid detergent fiber degradation showed a linear increase (p < 0.05). In situ dry matter digestibility (DMDis), in situ organic matter digestibility (OMDis), b, a + b, c, and effective digestibility (ED) of DMDis, a, a + b, c, and ED of OMDis increased linearly (p < 0.05). Dry matter intake, OM intake, and crude protein intake showed a linear increase (p < 0.05); NDF intake and ADF intake presented a quadratic behavior (p < 0.05). Apparent digestibility of DM, OM, CP, and hemicellulose, pH, N-NH3, total bacterial count, acetate, propionate, butyrate, volatile fatty acids, acetate: propionate ratio, cellulolytic bacteria, and protozoa did not present a linear or quadratic orthogonal effect (p > 0.05). Conclusion: The in vitro, in situ, and in vivo variables demonstrated that up to 60% mango silage can be used for the intensive fattening of calves in confinement.

Pain control with punch grafting in ulcers with underlying arteriolosclerosis.

OBJECTIVE: Martorell hypertensive ischaemic ulcers are often misdiagnosed and can be a clinical and therapeutic challenge. Controversy exists regarding both their underlying triggers and the type of treatment that should be carried out. This study was designed to compare the effectiveness of punch grafting and conventional therapy in pain reduction. METHOD: A single-centre retrospective study was performed, including 40 patients with a clinical diagnosis of a Martorell ulcer or post-traumatic ulcer secondary to arteriolopathy in the elderly, who were treated with punch grafting (n= 24) or conventional medical treatment (n=16). RESULTS: There was a statistically and clinically significant reduction in pain after punch grafting. The minimal overall reduction was of three points in visual analogue pain scores. Of the patients who received punch grafting, 80% reported a VAS pain score of 0 at the third follow-up, in contrast with the 44% (n=4) patients who were treated without punch grafting. The mean time to epithelialisation was 82.1 days in patients who received conventional treatment and 43.5 days in those who received punch grafts. CONCLUSION: Punch grafting is a simple, validated and cost-effective technique that can be performed on an outpatient basis, promotes wound healing and reduces pain. It may control pain and stimulate epithelialisation even if the wound does not present with optimum wound bed characteristics for graft taking. Pain reduction and faster epithelialisation are associated with improvements in patients' quality of life.

Assessment of the dynamics of concentration and competitive positions of the Baltic cruise port system.

Objective: This study aims to investigate the degree of concentration and the competitive positions of the Baltic cruise port network. Methods: A set of 29 Baltic ports are analysed, market concentration is evaluated using the analytical technique of the Herfindahl-Hirschman index, and competitive positions are determined through portfolio analysis based on the Boston Consulting Group matrix from 2000 to 2019. Results: The Herfindahl-Hirschman index indicates that the Baltic cruise port system is unconcentrated with an average score of 0.11 for the analysed period, suggesting that eight of the twenty-nine ports are the dominant ports in the Baltic. Portfolio analysis results suggest that the hierarchy picture of competitive positions is dynamic and has changed over time. The Baltic cruise port system has a wide range of competitive positions. Kiel and Rostock becoming mature leaders is one of the most relevant changes in competitive positions. Implications of the research: This study contributes to the literature not only by investigating the competitive positions of the second most important European operational area for cruise ships but also by filling the gap in research on the concentration and competitive strategic positions of Baltic cruise ports. This research allows seaport operators to visualise the position and progress of selected ports and predict the possible future seaport developments.

Validación de la versión española del cuestionario Wound-QoL / Validation of the Spanish Wound-QoL Questionnaire

ANTECEDENTES Y OBJETIVOS: El Wound-QoL es un cuestionario validado para medir la calidad de vida en pacientes con heridas crónicas, que fue desarrollado originalmente para su uso en alemán. El objetivo de este estudio fue traducir el cuestionario Wound-QoL para su uso en la práctica clínica y estudios de investigación en España, así como validar esta versión. MATERIALES Y MÉTODOS: Se realizaron dos traducciones independientes del Wound-QoL, directa e inversa, a partir de la versión original en alemán, seguidas de un consenso de expertos sobre las versiones resultantes. Después de su perfeccionamiento se realizó un estudio piloto y posteriormente el estudio de validación. RESULTADOS: Se incluyó un total de 115 pacientes. La edad media fue de 69,5 (DE 14,5) años, y el 60,0% eran mujeres. La versión española del Wound-QoL mostró una excelente consistencia interna (índice alfa de Cronbach > 0,8 en todas las escalas). El análisis factorial dio como resultado las mismas escalas que la versión original. Se objetivaron características satisfactorias de la distribución de la puntuación global y de las subescalas. La validez de constructo y la validez convergente con otros resultados (calidad de vida genérica, tasa de curación) fueron satisfactorias. La gran mayoría de los pacientes consideraron que el cuestionario era una herramienta sencilla y factible. El tiempo medio necesario para completar el cuestionario fue de 5 minutos. El 99,1% de los participantes consideraron que las preguntas eran fáciles de entender y el 94,7% declaró que personal. CONCLUSIONES: La versión española del Wound-QoL muestra una excelente validez en la práctica clínica. Por lo tanto, puede ser recomendada para su uso tanto en la rutina clínica como en los ensayos

BACKGROUND AND AIMS: The Wound-QoL is a validated and feasible questionnaire for measuring disease-specific health-related quality of life in chronic wounds, originally developed for use in German. The objective of this study was to translate the Wound-QoL for use in clinical care and in clinical trials in Spain and to validate this version. MATERIALS AND METHODS: Two independent fourth- and back translations of the Wound-QoL from the original German version were conducted, followed by an expert consensus of the resulting versions. After refinement, the final tool was piloted in N = 10 patients and then used in the validation study. RESULTS: A total of 115 patients were recruited. Mean age was 69.5 (SD 14.5) years, 60.0% were female. The Spanish version of Wound-QoL showed high internal consistency (Cronbach's alpha > 0.8 in all scales). Factor analysis resulted in the same scales as the original version. There were satisfactory distribution characteristics of the global score and the subscales. Construct validity and convergent validity with other outcomes (generic QoL, healing rate) were satisfactory. The vast majority of patients considered the Wound-QoL a simple and feasible tool. Mean time needed for completing the questionnaire was 5 minutes. Overall, 99.1% of the participants found it easy to understand the questions and 94.7% stated that the questionnaire suits the personal situation. CONCLUSIONS. The Spanish version of the Wound-QoL shows good validity in clinical practice. It can be recommended for use in clinical routine and trials

Validation of the Spanish Wound-QoL Questionnaire. / Validación de la versión española del cuestionario Wound-QoL.

BACKGROUND AND AIMS: The Wound-QoL is a validated and feasible questionnaire for measuring disease-specific health-related quality of life in chronic wounds, originally developed for use in German. The objective of this study was to translate the Wound-QoL for use in clinical care and in clinical trials in Spain and to validate this version. MATERIALS AND METHODS: Two independent fourth- and back translations of the Wound-QoL from the original German version were conducted, followed by an expert consensus of the resulting versions. After refinement, the final tool was piloted in N=10 patients and then used in the validation study. RESULTS: A total of 115 patients were recruited. Mean age was 69.5 (SD 14.5) years, 60.0% were female. The Spanish version of Wound-QoL showed high internal consistency (Cronbach's alpha>0.8 in all scales). Factor analysis resulted in the same scales as the original version. There were satisfactory distribution characteristics of the global score and the subscales. Construct validity and convergent validity with other outcomes (generic QoL, healing rate) were satisfactory. The vast majority of patients considered the Wound-QoL a simple and feasible tool. Mean time needed for completing the questionnaire was 5minutes. Overall, 99.1% of the participants found it easy to understand the questions and 94.7% stated that the questionnaire suits the personal situation. CONCLUSIONS: The Spanish version of the Wound-QoL shows good validity in clinical practice. It can be recommended for use in clinical routine and trials.

Association of autologous punch grafting, TLC-NOSF dressing and multitype compression therapy to rapidly achieve wound closure in hard-to-heal venous leg ulcers.

OBJECTIVE: To document the efficacy of a combined therapeutic strategy in achieving rapid wound healing in patients with long-standing ulcers. MATERIALS AND METHODS: Outpatients with hard-to-heal venous leg ulcers were included in an interventional, prospective, single-arm, mono-centre study and treated with autologous punch grafting, TLC-NOSF dressing and multi-type compression therapy. The primary outcome was the percentage of healed wounds by week 12. Secondary outcomes included time-to-reach wound closure, wound area reduction, treatment acceptability and safety. RESULTS: From November 2018 to October 2019, 42 patients with 51 ulcers were included (23 males, 70.6±40.8 years old, with multiple comorbidities). Despite poor wound healing prognosis at baseline (47% of recurrent ulcers, with a mean duration of 15 months and a mean area of 12.6cm2), wound healing was achieved in 47 ulcers (92%) after a mean period of treatment of 25±13 days. A relative wound area reduction>75% was also reached in three additional ulcers by the last evaluation visit. No adverse event related to the procedure was reported throughout the study period. The associated treatment were very well tolerated and accepted by the patients. CONCLUSIONS: The evaluated procedure induced fast re-epithelisation of the treated ulcers. Based on our experience, this simple and successful reparative strategy may be considered as an interesting option in the treatment of venous leg ulcers of poor prognosis.

Early and Sequential Punch Grafting in the Spectrum of Arteriolopathy Ulcers in the Elderly.

INTRODUCTION: Posttraumatic ulcers secondary to age-related arteriolosclerosis may be included in the clinic-histopathological spectrum of the Martorell hypertensive ischemic ulcer. Histologically, they both present occlusive subcutaneous arteriolosclerosis. Considering these similarities, they could benefit from the same treatment. CASE REPORT: The authors present an 84-year-old white female who had a painful 9-cm x 4-cm ulcer of the central inner aspect of her left leg. The ulcer had developed 2 months prior after mild trauma, with good response to early and sequential punch grafting, combined with single-use negative pressure wound therapy and compression therapy. Pain reduction was obtained from the first punch grafting session. To achieve complete epithelialization 16 weeks after the first punch grafting procedure, 2 more sessions were necessary. CONCLUSIONS: Early punch grafting is an effective technique for pain control and healing promotion in Martorell ulcers. Punch grafting, which may be performed in an outpatient setting, is well tolerated by patients and may be repeated several times if necessary.

Inclusion of ripe mango as a source of energy in diets for Creole lambs in the dry tropics.

The aim of this investigation was to evaluate the use of ripe mango as a source of energy in an integral diet consisting of regional products for fattening lambs. Twenty-seven Creole lambs were used and given a 10-day period to adapt to the diet. Three treatments were evaluated: T1 = 40% mango; T2 = 50% mango; and T3 = control diet. In the in vitro analysis, partial and accumulated production of biogas and methane, degradation of dry matter, and neutral detergent fiber were determined. In the in vivo analysis, dry matter intake (DMI), daily weight gain (DWG), apparent digestibility of nutrients, and ruminal characteristics were estimated. The experimental design was completely random. The in vitro results helped hypothesize that the diets with low fiber content would not affect potential dry matter intake. With the exception of the protozoa count, ruminal characteristics were not different among diets (p > 0.05). In productive response, T3 was 13.73% higher DMI than T1, which was 32.24% higher than T2. T3 promoted 61.22% more DWG than T1 and T2. T2 displayed better digestibility of dry matter, organic matter, neutral detergent fiber, and crude protein than T3 (p < 0.05). Fattening lambs fed rations that contain 40% and 50% mango reduces the dry matter intake and daily weight gain relative to the control, although apparent digestibility is higher than for the control diet.

Punch grafting for pain reduction in hard-to-heal ulcers.

OBJECTIVE: Punch-grafting is a traditional technique to enhance wound healing, which has been associated with significant pain reduction. There are few studies measuring pain reduction after punch grafting, our study was designed to measure this outcome. METHOD: Patients with hard-to-heal wounds treated with punch grafting were included in a single centre prospective study. Wound pain intensity was measured using a Visual Analogue Scale (VAS) at baseline (before the procedure) and at three time points after the procedure. Punch grafting was performed in an outpatient setting. Patient demographic data, wound aetiology and percentage of graft take were recorded. RESULTS: A total of 136 patients were included (62 men and 74 women). Mean age was 60±35 years and 51 (38%) had venous leg ulcers (VLU), 29 (21%) had postoperative wounds, 15 (11%) Martorell ulcers, 15 (11%) traumatic wounds, four (3%) arterial ulcers and 22 (16%) 'other' ulcers. Of the patients, 38 (28%) did not present with painful ulcers and, after punch grafting, all of them remained painless; 29 (21%) patients obtained >70% pain reduction, whereas 73 (54%) patients achieved pain suppression. Pain suppression did not depend on the percentage of graft take. CONCLUSION: Punch-grafting is a simple, technique that not only promotes wound healing but also reduces pain. It can also be performed on an outpatient basis. Further studies should be performed to achieve a better understanding of this beneficial finding. Declaration of interest: The authors have no conflicts of interest to declare.

Uso de disacáridos y carbón activado para preservar consorcios de bacterias ruminales celulolíticas liofilizadas / Use of disaccharides and activated carbon to preserve cellulolytic ruminal bacterial consortiums lyophilized

RESUMEN Objetivo. Determinar la fermentación in vitro de consorcios bacterianos ruminales celulolíticos (CBC) conservados por liofilización usando carbón activado, maltosa y lactosa como preservadores. Materiales y métodos. Un CBC se aisló de fluido ruminal de una búfala de agua en medios selectivos celulolíticos. Los CBC se liofilizaron con carbón activado (CA), lactosa (LA) o maltosa (MA) como preservadores y sin preservador (SP). El diseño experimental fue completamente al azar para medir biogás a diferentes intervalos de tiempo; así como, un diseño completamente al azar con arreglo factorial 4x3, los factores fueron preservadores (SP, CA, LA y MA) y tiempo de fermentación (24, 48 y 72 h) para pH, nitrógeno amoniacal (N-NH3), degradación de materia seca (DMS) y de fibra detergente neutro (DFDN), actividad enzimática celulasas y la población de bacterias totales. Resultados. LA produjo mayor biogás acumulado a las 72 h y parcial a partir de las 12 h (p≤0.05). SP no mostró diferencias (p>0.05) en celulasas, conteo de bacterias total, DMS y DFDN en los tiempos de fermentación evaluados con el resto de los preservadores. Conclusiones. La producción de biogás parcial y acumulada, el aumento en la tasa de degradación de 8.3 y 91.1 % en la DMS y DFDN de las 24 a 72 h (p≤0.05) con el preservador LA, muestran que la lactosa puede usarse como preservador de bacterias celulolíticas ruminales.

ABSTRACT Objective. To determine in vitro fermentation of cellulolytic ruminal bacterial consortia (CBC) preserved by lyophilization using activated carbon, maltose and lactose as preservatives. Materials and methods. A CBC was isolated from the ruminal fluid of a female water buffalo in selective cellulolytic media. The CBC were lyophilized without preservative (SP), activated carbon (CA), lactose (LA) o maltose (MA) as preservatives. The experimental design was completely random to measure biogas at different time intervals; as well as completely random with 4x3 factorial arrangement, factors were preservative [SP, CA, LA and MA] and fermentation time (24, 48 and 72 h) for pH, ammoniacal nitrogen (NH3-N), dry matter degradation (DMD), neutral detergent fiber degradation (NDFD), enzymatic activity cellulases and total bacteria population. Results. LA produced higher accumulated biogas at 72 h and partial biogas after 12 h (p≤0.05). SP did not show differences (p>0.05) in cellulases, total bacteria population, DMD and NDFD in the fermentation times evaluated with the rest of the preservative. Conclusions. The production of partial and accumulated biogas, the increase in the degradation rate of 8.3 and 91.1% in the DMD and NDFD from 24 to 72 h (p≤0.05) in the LA preservative, show that lactose can be used as a preservative of ruminal cellulolytic bacteria.

Growth performance and health of nursing lambs supplemented with inulin and Lactobacillus casei.

OBJECTIVE: This experiment was designed to evaluate the effects of Agave tequilana inulin and Lactobacillus casei (L. casei) on growth performace, hematological variables, serum metabolites, and total coliforms in nursing lambs. METHODS: The experimental design was completely randomized; treatments were T1, control (pre-starter concentrate, PC), T2: T1+2% inulin, and T3: T1+2% inulin+L. casei; treatments were compared with Tukey test (p≤0.05); and 45 new born Kathadin×Dorset lambs (4.8±0.8 kg birth weight) were the experimental units (15 per treatment). The variables were daily weight gain (DWG), dry matter intake and diarrheas incidence (%) during 56 d. Twenty-four hours after birth and at the end of the experiment, blood samples were collected to evaluate hematological variables and serum metabolites. Besides, the populations of total coliforms and lactobacilli were estimated in fecal samples. RESULTS: Addition of agave inulin and L. casei increased (p≤0.05) DWG 356, 384, and 415 g/d, weaning weight 24.92, 26.18, and 28.07 kg, as well as lactobacilli population 5.79, 6.32, and 6.48 Log10 cfu/g, for T1, T2, and T3, respectively. Lambs fed L. casei had decreased (p≤0.05) populations of total coliforms (T1 = 6.18, T2 = 5.77, and T3 = 5.07 Log10 cfu/g), diarrheas incidence (T1 = 11.67%, T2 = 8.33%, and T3 = 5.0%), and serum cholesterol concentration (11% in T2 and 13% in T3, compared to control). CONCLUSION: The combination of Agave tequilana inulin and L. casei increases weight gain and improves intestinal health by reducing coliforms and diarrheas incidence in Katahdin× Dorset lambs during the pre-weaning period.

In vitro fermentation of fibrous substrates by water buffalo ruminal cellulolytic bacteria consortia / Fermentación in vitro de consorcios bacterianos celulolíticos ruminales de búfalos de agua en sustratos fibrosos

ABSTRACT Objective. To measure the in vitro fermentation variables of a cellulolytic bacteria consortium (CBC) isolated from a water buffalo rumen in coculture with total ruminal bacteria (TRB) on two fibrous substrates. Materials and methods. A CBC was isolated from the ruminal fluid of a female water buffalo in selective cellulolytic media. The experimental design was completely random with a 3x2 factorial arrangement; factors were treatments [TRB, CBC, and coculture (TRB + CBC)] and substrates (cobra grass and corn stover). Total gas and methane (CH4) production were measured at different time intervals. At 72 h, measurements were taken of pH, ammoniacal nitrogen (NH3-N), dry matter degradation (DMD), neutral detergent fiber degradation (NDFD) and total bacteria population. Results. Gas production with both substrates was highest (p≤0.05) in the coculture at 3, 6 and 24 h. At 48 and 72 h, gas production in the cobra grass was highest (p≤0.05) in the coculture. The coculture and TRB did not differ (p>0.05) in terms of CH4, DMD and NDFD values at 48 and 72 h. With the cobra grass, NH3-N concentration was higher (p≤0.05) in the coculture than in the TRB. Conclusions. The gas production and dry matter degradation values of the water buffalo rumen cellulolytic bacteria consortia indicate them to be a promising alternative for improving cobra grass structural carbohydrates degradation when in coculture with bovine ruminal bacteria.

RESUMEN Objetivo. Determinar las variables fermentativas in vitro de un consorcio bacteriano celulolítico (CBC) aislado de una búfala de agua en cocultivo con bacterias ruminales totales (BRT) en sustratos fibrosos. Materiales y métodos. Un CBC se aisló de fluido ruminal de una búfala de agua en medios selectivos celulolíticos. El diseño experimental fue un diseño completamente al azar con arreglo factorial 3x2, los factores fueron tratamientos [BRT, CBC y un cocultivo (BRT + CBC)] y sustratos (pasto pangola y rastrojo de maíz). La producción de gas total y metano (CH4) se midieron a diferentes intervalos de tiempo. Además, se estimó pH, nitrógeno amoniacal (N-NH3), degradación de materia seca (DMS) y de fibra detergente neutro (DFDN), y la población de bacterias totales a 72 h de incubación. Resultados. El cocultivo produjo mayor (p≤0.05) cantidad de gas a las 3, 6 y 24 h en ambos sustratos. A las 48 y 72 h, el cocultivo produjo mayor (p≤0.05) gas en pasto cobra. El cocultivo y las BRT no presentaron diferencias (p>0.05) en la producción de CH4 a 48 y 72 h, y en DMS y DFDN (p>0.05). En el pasto cobra, la concentración de N-NH3 con el cocultivo fue mayor (p≤0.05) que con BRT. Conclusiones. La producción de gas y degradación de materia seca de los consorcios bacterianos celulolíticos procedentes del rumen de una búfala de agua muestran que son una alternativa para mejorar la fermentación de carbohidratos estructurales del pasto cobra cuando se cocultivan con bacterias ruminales bovinas.

Martorell Hypertensive Ischemic Ulcer Successfully Treated With Punch Skin Grafting.

Martorell hypertensive ischemic ulcer can be a real clinical and therapeutic challenge. Controversy exists regarding both the underlying triggers of the disease and the type of treatment that should be established. Early skin grafting has been suggested as an effective treatment to enhance pain reduction and wound healing in these patients. The authors present the case of a 68-year-old woman with well-controlled hypertension and diabetes who developed extremely painful, rapidly progressing bilateral ulcers on the distal aspect of her legs. Without previous surgical debridement, the lesions were covered with punch grafts. Pain and necrotic progression were immediately controlled and complete epithelialization was achieved in 7 weeks.

Structural studies of the exopolysaccharide produced by a submerged culture of entomopathogenic fungus Metarhizium anisopliae / Estudio estructural del exopolisacárido producido por un cultivo sumergido del hongo entomopatogénico Metarhizium anisopliae

The exopolysaccharide (EPS) separated from the entomopathogenic fungus Metarhizium anisopliae was determined by gel permeation chromatography to be homogeneous. The high-performance anion-exchange chromatography with pulsed-amperometric detection (HPAE-PAD) showed a content of monosaccharides D-galactosamine and D-fucose at a molar ratio of about 2:1. The results obtained from Fourier transform-infrared spectroscopy (FT-IR) and second derivative FT-IR spectrum confirmed the proposed structure.

El exopolisacárido (EPS) separado desde el hongo entomopatogénico Metarhizium anisopliae determinado por cromatografía de exclusión en gel ser homogéneo. La cromatografía iónica de alto rendimiento con detección de pulso amperométrico (HPAE-PAD) mostró un contenido de monosacáridos D-galactosamina y D-fucosa en una relación molar de alrededor de 2:1. Los resultados obtenidos desde la espectroscopía infrarroja con transformada de Fourier (FT-IR) y la segunda derivada del espectro FT-IR confirmaron la estructura propuesta.

Solubility effects on antibacterial activity of chemically modified chitooligosaccharides of fungal origin / Efectos de la solubilidad sobre la actividad antibacteriana de quitooligosacáridos modificados químicamente de origen fúngico

Chitin and chitosan are a class of metabolites that occurring in some fungi species that are associated with commercial and medicinal plants, this is in Mucor sp. for example with an ample number of biological activities, being antibacterial and antifungal one of the most important. Into our program of search of biopesticides and natural compounds with biological activities, we have studying chitosan that was obtained from the culture medium of the fungus Mucor ruoxii. Chitooligosaccharides were prepared by partial acid hydrolysis of native chitosan and an aminoglycosylated derivative was obtained by reductive amination of the chitooligosaccaride. The solubilities of these compounds were measured at different pHs and its antibacterial activity against Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive). Chitosan and the derivatives tested exhibited a good antibacterial activity against S. aureus.

Quitina y quitosano son una clase de metabolitos que producen algunas especies de hongos que están asociados con plantas medicinales y comerciales, esto es por ejemplo en Mucor sp., con un amplio número de actividades biológicas, siendo la antibacteriana y antifúngica unas de las más importantes. En nuestro programa de investigación de biopesticidas y compuestos naturales, estamos estudiando quitosano obtenido de el medio de cultivo del hongo Mucor ruoxii. Quitooligosacáridos fueron preparados por hidrólisis parcial ácida de quitosano nativo y un derivado aminoglicosilado fue obtenido por aminación reductiva del quitooligosacárido. Las solubilidades de estos compuestos fueron medidas a diferentes pHs y su actividad antibacteriana frente a Escherichia coli (gram-negative) and Staphylococcus aureus (gram-positive). Quitosano y los derivados testeados exhiben una buena actividad antibacteriana frente a S. aureus.

Fungemias nosocomiales en un hospital general: epidemiología y factores pronóstico. Estudio prospectivo 1993-1998 / Nosocomial fungemias in a general hospital. Epidemiology and prognostic factors. Prospective study 1993-1998

FUNDAMENTO. Las fungemias de origen nosocomial son infecciones que conllevan una elevada mortalidad. En los últimos años la incidencia de estas infecciones ha aumentado probablemente por la utilización creciente de procedimientos diagnósticos y terapéuticos agresivos, así como por el incremento de la población de pacientes inmunocomprometidos. El objetivo de nuestro estudio fue conocer las características epidemiológicas, factores de riesgo, manifestaciones clínicas, y el pronóstico de las fungemias que se producen en nuestro medio. PACIENTES Y MÉTODOS. Se evaluaron en un período de 5 años de forma prospectiva todos los pacientes con un episodio de fungemia demostrada. A todos los que sobrevivieron se les realizó un seguimiento mínimo de un mes tras la finalización del tratamiento. La identificación del hongo se realizó por métodos habituales. RESULTADOS. Durante el período de estudio se documentaron 81 pacientes con un episodio de fungemia. La incidencia de la misma fue de 0,9 episodios/1.000 pacientes ingresados. Candida albicans fue el hongo más frecuentemente aislado (n=53), seguido de C. parapsilosis (n=11), C. tropicalis (n=6) y C.glabrata (n=5). La mayoría de los pacientes tenían colocado un catéter intravascular central y estaban recibiendo nutrición parenteral. Todos habían sido tratados con antibióticos de forma prolongada. La mortalidad global fue del 49,6 por ciento. La edad, la cirugía previa, la presencia de inestabilidad hemodinámica y el inicio tardío del tratamiento antifúngico se asociaron con un peor pronóstico. CONCLUSIONES. La incidencia de fungemia es alta en nuestro medio, y se asocia con una elevada mortalidad sobre todo en aquellos pacientes en los que se retrasó el inicio de tratamiento antifúngico. El pronóstico de esta infección puede mejorar con un mayor índice de sospecha clínica (AU)

Fallo en la detección de Brucella melitensis en tres sistemas de hemocultivo / Failure in detecting Brucella melitensis in three blood-culture systems

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Estudio de la etnobotánica médica Mam en los municipios de Todos Santos Cuchumatán, San Juan Atitán, San Rafael Petzal y Chiantla, del departamento de Huehuetenango, Guatemala / Study of the medical ethnobotany Mam in the municipalities of Todos Santos Cuchumatán, San Juan Atitán, San Rafael Petzal and Chiantla, department of Huehuetenango, Guatemala

El objetivo principal del presente estudio es contribuir al estudio de la etnobotánica médica Mam en los municipios de Todos Santos Cuchumatán, San Juan Atitán, San Rafael Petzal y Chiantla del departamento de Huehuetenango, por medio de la elaboración de monografías de cada planta medicinal reportada; las mismas incluyen observaciones de campo, información de los habitantes principales curanderos, chimanes, comadronas, parteras y población en general, así como revisión bibliográfica. Como segundo objetivo se elaboró un herbario de las plantas medicinales reportadas en el área de estudio; el cual se depositó en el herbario de la Facultad de Agronomía "José Carrillo", para el enriquecimiento del mismo.